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Inaba Y, Yanagisawa T. Droplet dynamics affecting the shape of patterns formed spontaneously by transforming UV-curable emulsions. Sci Rep 2024; 14:7102. [PMID: 38531979 DOI: 10.1038/s41598-024-57851-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 03/22/2024] [Indexed: 03/28/2024] Open
Abstract
Forming large pitch and depth patterns spontaneously based on a bottom-up approach is a challenging task but with great industrial value. It is possible to spontaneously form an uneven (concave-convex) patterns with submillimeter-to-millimeter-scale pitches and depths by the direct pattern exposure of a UV-curable oil-in-water (O/W) emulsion liquid film. UV irradiation generates a latent pattern of a cured particle aggregation in the liquid film, and an uneven structure is spontaneously formed during the subsequent drying process. This process does not require any printing and embossing plates or development process. In this report, we presented an example of unevenness formation with a maximum pattern depth of approximately 0.4 mm and a maximum pitch width of 5 mm. The patterns formed by this method have raised edges in the exposed areas and fogging in unexposed areas. The pattern shapes become conspicuous under overexposure conditions, but the formation mechanism has not yet been understood in detail and needs to be investigated. In this study, we focused on the exposure process and clarified the mechanism of pattern formation by analyzing the dynamics of emulsion droplets in the medium by an in situ microscopy observation method. As a result, we found that the fogging was mainly caused by light leakage from the exposed area, and the raised pattern edges were caused by droplets transported from the unexposed area to the exposed area. Furthermore, the convection caused by the heat generated from polymerization is a determining factor affecting all these phenomena. By controlling the pattern shape related to convection utilizing direct projection exposure, we showed an example of eliminating raised pattern edges with a height difference of approximately 0.1 mm. By devising and selecting exposure methods, we can expand the range of design applications such as interior decorative patterns.
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Affiliation(s)
- Yoshimi Inaba
- Toppan Technical Research Institute, TOPPAN Holdings Inc., Sugito, Saitama, 345-8508, Japan.
| | - Takayuki Yanagisawa
- Toppan Technical Research Institute, TOPPAN Holdings Inc., Sugito, Saitama, 345-8508, Japan
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Palityka D, Chrysikou E, Murtagh N. Accessible art in healthcare facilities: exploring perspectives of healthcare art for visually impaired people. FRONTIERS IN MEDICAL TECHNOLOGY 2023; 5:1205361. [PMID: 37937067 PMCID: PMC10627155 DOI: 10.3389/fmedt.2023.1205361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Accepted: 10/05/2023] [Indexed: 11/09/2023] Open
Abstract
Introduction Art in healthcare facilities shows promising results in improving patients' health and well-being and, as such, meets the WHO's definition of health technology. Yet, it remains unclear if healthcare art equally benefits all users. Given the growing number of visually impaired people (VIP), it is valuable to determine whether healthcare art is accessible to VIP and to explore strategies for improving it. Methods This study employed a mixed methodology, which included (1) secondary research of 25 cases of healthcare art programmes to identify the presence of accessible art in healthcare facilities and the practices that influence it; (2) review of thirty-one Health Building Notes and four supplementary British guidelines on healthcare art to discover if the accessibility of art is required and identify which recommendations influence it; and (3) interview surveys of healthcare art practitioners from three London NHS Trusts to identify opportunities to increase arts accessibility. Results and discussion The evidence showed that healthcare art programmes were mostly inaccessible to VIP. Most healthcare art programmes did not involve VIP in the commissioning process and, thus, lacked procedures that could facilitate accessibility. There were not enough recommendations in the healthcare facility guidelines to support the accessibility of arts for VIP. The recommendations on artwork in healthcare facility guidelines could increase accessibility if particular conditions were met. Interviews with NHS trusts in London revealed numerous opportunities to improve arts accessibility for healthcare art programmes.
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Affiliation(s)
- Daryia Palityka
- The Bartlett School of Sustainable Construction, University College London, London, United Kingdom
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Farid MI, Wu W, Liu X, Wang P. Additive manufacturing landscape and materials perspective in 4D printing. THE INTERNATIONAL JOURNAL, ADVANCED MANUFACTURING TECHNOLOGY 2021; 115:2973-2988. [PMID: 34092882 PMCID: PMC8166533 DOI: 10.1007/s00170-021-07233-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 05/04/2021] [Indexed: 06/02/2023]
Abstract
4D printing is inspired by embedded product designs to produce stimuli-responsive consumables fabricated by available commercial 3D printers. Although significant progress on smart material performance has been made and different studies have focused on new strategies and process improvements in typical additive manufacturing. Herein, the proposed review article discusses material arrangements for 4D printing, highlighting the structural evolvement mechanism, the behavior of deformation, and their prospective implementation with respect. Starting from a generalized idea, and fundamental workflow, together with a graphical manifestation of the 4D printing concept, and 4D printing for shape-memory materials (SMMs), self-fitting wearables based on shape memory alloys (SMAs) are reviewed exclusively. Furthermore, the capabilities of single and multiple materials mechanisms for shape-shifting behavior are summarized. Finally, we explored the future application potential under succeeding context: SMA-based knitted garments, transforming food, and relevant sectors wise development and proceedings with the advancement in smart materials. We determined our review by aiming our future directions such as the "dream it and make it feasible" technology. GRAPHICAL ABSTRACT
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Affiliation(s)
- Muhammad Imran Farid
- Advanced Materials Additive Manufacturing Lab ((AM)2), School of Mechanical and Aerospace Engineering, Jilin University, Changchun, Jilin, 130025 China
| | - Wenzheng Wu
- Advanced Materials Additive Manufacturing Lab ((AM)2), School of Mechanical and Aerospace Engineering, Jilin University, Changchun, Jilin, 130025 China
| | - Xilin Liu
- Advanced Materials Additive Manufacturing Lab ((AM)2), School of Mechanical and Aerospace Engineering, Jilin University, Changchun, Jilin, 130025 China
| | - PeiPei Wang
- Advanced Materials Additive Manufacturing Lab ((AM)2), School of Mechanical and Aerospace Engineering, Jilin University, Changchun, Jilin, 130025 China
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Marew T, Birhanu G. Three dimensional printed nanostructure biomaterials for bone tissue engineering. Regen Ther 2021; 18:102-111. [PMID: 34141834 PMCID: PMC8178073 DOI: 10.1016/j.reth.2021.05.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 03/29/2021] [Accepted: 05/04/2021] [Indexed: 12/13/2022] Open
Abstract
The suffering from organ dysfunction due to damaged or diseased tissue/bone has been globally on the rise. Current treatment strategies for non-union bone defects include: the use of autografts, allografts, synthetic grafts and free vascularized fibular grafts. Bone tissue engineering has emerged as an alternative for fracture repair to satisfy the current unmet need of bone grafts and to alleviate the problems associated with autografts and allografts. The technology offers the possibility to induce new functional bone regeneration using synergistic combination of functional biomaterials (scaffolds), cells, and growth factors. Bone scaffolds are typically made of porous biodegradable materials that provide the mechanical support during repair and regeneration of damaged or diseased bone. Significant progress has been made towards scaffold materials for structural support, desired osteogenesis and angiogenesis abilities. Thanks for innovative scaffolds fabrication technologies, bioresorbable scaffolds with controlled porosity and tailored properties are possible today. Despite the presence of different bone scaffold fabrication methods, pore size, shape and interconnectivity have not yet been fully controlled in most of the methods. Moreover, scaffolds with tailored porosity for specific defects are still difficult to manufacture. Nevertheless, such scaffolds can be designed and fabricated using three dimensional (3D) printing approaches. 3D printing technology, as an advanced tissue scaffold fabrication method, offers the opportunity to produce complex geometries with distinct advantages. The technology has been used for the production of various types of bodily constructs such as blood vessels, vascular networks, bones, cartilages, exoskeletons, eyeglasses, cell cultures, tissues, organs and novel drug delivery devices. This review focuses on 3D printed scaffolds and their application in bone repair and regeneration. In addition, different classes of biomaterials commonly employed for the fabrication of 3D nano scaffolds for bone tissue engineering application so far are briefly discussed.
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Affiliation(s)
- Tesfa Marew
- Department of Pharmaceutics & Social Pharmacy, School of Pharmacy, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Gebremariam Birhanu
- Department of Pharmaceutics & Social Pharmacy, School of Pharmacy, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
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Dai L, Cheng T, Duan C, Zhao W, Zhang W, Zou X, Aspler J, Ni Y. 3D printing using plant-derived cellulose and its derivatives: A review. Carbohydr Polym 2019; 203:71-86. [DOI: 10.1016/j.carbpol.2018.09.027] [Citation(s) in RCA: 170] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Revised: 09/09/2018] [Accepted: 09/14/2018] [Indexed: 01/16/2023]
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Liu S, Li L. Ultrastretchable and Self-Healing Double-Network Hydrogel for 3D Printing and Strain Sensor. ACS APPLIED MATERIALS & INTERFACES 2017; 9:26429-26437. [PMID: 28707465 DOI: 10.1021/acsami.7b07445] [Citation(s) in RCA: 201] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
On the basis of the thermoreversible sol-gel transition behavior of κ-carrageenan in water, a double-network (DN) hydrogel has been fabricated by combining an ionically cross-linked κ-carrageenan network with a covalently cross-linked polyacrylamide (PAAm) network. The κ-carrageenan/PAAm DN hydrogel demonstrated an excellent recoverability and significant self-healing capability (even when notched). More importantly, the warm pregel solution of κ-carrageenan/AAm can be used as an ink of a three-dimensional (3D) printer to print complex 3D structures with remarkable mechanical strength after UV exposure. Furthermore, the κ-carrageenan/PAAm DN hydrogel exhibited a great strain sensitivity with a gauge factor of 0.63 at the strain of 1000%, and thus, the hydrogel can be used as sensitive strain sensors for applications in robotics and human motion detection.
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Affiliation(s)
- Sijun Liu
- School of Mechanical and Aerospace Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Lin Li
- School of Mechanical and Aerospace Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798, Singapore
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Yan X, Hao L, Xiong W, Tang D. Research on influencing factors and its optimization of metal powder injection molding without mold via an innovative 3D printing method. RSC Adv 2017. [DOI: 10.1039/c7ra11271h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This work makes it possible to carry out metal powder injection molding without a mold to manufacture metal and alloy components.
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Affiliation(s)
- Xiaokang Yan
- Advanced Manufacturing Research Center for Jewelry
- Gemological Institute
- China University of Geosciences
- Wuhan
- China
| | - Liang Hao
- Advanced Manufacturing Research Center for Jewelry
- Gemological Institute
- China University of Geosciences
- Wuhan
- China
| | - Wei Xiong
- Advanced Manufacturing Research Center for Jewelry
- Gemological Institute
- China University of Geosciences
- Wuhan
- China
| | - Danna Tang
- Advanced Manufacturing Research Center for Jewelry
- Gemological Institute
- China University of Geosciences
- Wuhan
- China
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Seo H, Heo SG, Lee H, Yoon H. Preparation of PEG materials for constructing complex structures by stereolithographic 3D printing. RSC Adv 2017. [DOI: 10.1039/c7ra04492e] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We raise issues regarding the 3D printing of complex structures using UV-curable materials. Models of failures based on the transparency of the UV-curable materials, high absorption not reaching the upper parts, and mechanical failure are discussed.
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Affiliation(s)
- Hyein Seo
- Department of Chemical and Biomolecular Engineering
- Seoul National University of Science & Technology
- Seoul
- Korea
| | - Seong Gil Heo
- Department of Chemical and Biomolecular Engineering
- Seoul National University of Science & Technology
- Seoul
- Korea
| | - Hyemin Lee
- Department of Chemical and Biomolecular Engineering
- Seoul National University of Science & Technology
- Seoul
- Korea
| | - Hyunsik Yoon
- Department of Chemical and Biomolecular Engineering
- Seoul National University of Science & Technology
- Seoul
- Korea
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Wonjin J, Jang HI, Harianto RA, So JH, Lee H, Lee HJ, Moon MW. Introduction of 3D Printing Technology in the Classroom for Visually Impaired Students. JOURNAL OF VISUAL IMPAIRMENT & BLINDNESS 2016. [DOI: 10.1177/0145482x1611000205] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Jo Wonjin
- Post-doctoral student, 3D Printing Group, Computational Science Research Center, Korea Institute of Science and Technology, 135–791, Seoul, Republic of Korea
| | - Hee I Jang
- Master's student, Korea Institute of Science and Technology, 3D Printing Group, Computational Science Research Center, Korea Institute of Science and Technology, 02792, Seoul, Republic of Korea
| | | | - Ji Hyun So
- Master's student, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Hyebin Lee
- Undergraduate student (senior), Kookmyung Women's University, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Heon Ju Lee
- Principal research scientist, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Myoung-Woon Moon
- Senior research scientist, Korea Institute of Science and Technology, Seoul, Republic of Korea
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